Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation
The present research aimed to evaluate the photocatalytic activity of reduced graphene oxide and manganese ferrite nanocomposite supported on eucalyptus wood ash waste (WA) from industrial boilers, for the decolorization of methylene blue (MB) solutions, using sunlight as an irradiation source. For...
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MDPI AG
2022-07-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/7/745 |
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| author | Maria Eliana Camargo Ferreira Lara de Souza Soletti Eduarda Gameleira Bernardino Heloise Beatriz Quesada Francielli Gasparotto Rosângela Bergamasco Natália Ueda Yamaguchi |
| author_facet | Maria Eliana Camargo Ferreira Lara de Souza Soletti Eduarda Gameleira Bernardino Heloise Beatriz Quesada Francielli Gasparotto Rosângela Bergamasco Natália Ueda Yamaguchi |
| author_sort | Maria Eliana Camargo Ferreira |
| collection | DOAJ |
| description | The present research aimed to evaluate the photocatalytic activity of reduced graphene oxide and manganese ferrite nanocomposite supported on eucalyptus wood ash waste (WA) from industrial boilers, for the decolorization of methylene blue (MB) solutions, using sunlight as an irradiation source. For this, the photocatalyst named MnFe<sub>2</sub>O<sub>4</sub>-G@WA was synthesized by a solvothermal method and characterized by analyzes of scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, Brunauer–Emmett–Teller and zeta potential. Firstly, the photocatalyst was evaluated for photocatalytic decolorization of MB under different reaction conditions. Then, the influence of pH, photocatalyst dose and H<sub>2</sub>O<sub>2</sub> was evaluated. MnFe<sub>2</sub>O<sub>4</sub>-G@WA showed 94% of efficiency for photocatalytic decolorization of MB under operating conditions of solar irradiation, 0.25 g/L of catalyst, 300 mg/L of H<sub>2</sub>O<sub>2</sub>. The proposed degradation reaction mechanism suggested that the photodegradation of MB was through a synergistic mechanism of photocatalysis and photo-Fenton reactions, with the combined action of the three materials used. The data adjusted to the first order kinetics from the Langmuir–Hinshelwood model. In addition, MnFe<sub>2</sub>O<sub>4</sub>-G@WA showed high stability, maintaining its efficiency above 90% after 5 cycles. The results indicated that the nanophotocatalyst is a potential technology for the decolorization of MB solutions. |
| first_indexed | 2024-03-09T12:05:17Z |
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| language | English |
| last_indexed | 2024-03-09T12:05:17Z |
| publishDate | 2022-07-01 |
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| spelling | doaj.art-028fc2bd9a3143208f0d39ed2353cf4c2023-11-30T22:57:51ZengMDPI AGCatalysts2073-43442022-07-0112774510.3390/catal12070745Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight IrradiationMaria Eliana Camargo Ferreira0Lara de Souza Soletti1Eduarda Gameleira Bernardino2Heloise Beatriz Quesada3Francielli Gasparotto4Rosângela Bergamasco5Natália Ueda Yamaguchi6Master’s Program in Clean Technologies, Technology and Innovation, Cesumar Institute of Science, Cesumar University, Maringá 87050-900, BrazilTechnological and Agrarian Sciences, Center for Exact, Cesumar University, Maringá 87050-900, BrazilMaster’s Program in Clean Technologies, Technology and Innovation, Cesumar Institute of Science, Cesumar University, Maringá 87050-900, BrazilDepartment of Chemical Engineering, State University of Maringá, Maringá 87020-900, BrazilMaster’s Program in Clean Technologies, Technology and Innovation, Cesumar Institute of Science, Cesumar University, Maringá 87050-900, BrazilDepartment of Chemical Engineering, State University of Maringá, Maringá 87020-900, BrazilMaster’s Program in Clean Technologies, Technology and Innovation, Cesumar Institute of Science, Cesumar University, Maringá 87050-900, BrazilThe present research aimed to evaluate the photocatalytic activity of reduced graphene oxide and manganese ferrite nanocomposite supported on eucalyptus wood ash waste (WA) from industrial boilers, for the decolorization of methylene blue (MB) solutions, using sunlight as an irradiation source. For this, the photocatalyst named MnFe<sub>2</sub>O<sub>4</sub>-G@WA was synthesized by a solvothermal method and characterized by analyzes of scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, Brunauer–Emmett–Teller and zeta potential. Firstly, the photocatalyst was evaluated for photocatalytic decolorization of MB under different reaction conditions. Then, the influence of pH, photocatalyst dose and H<sub>2</sub>O<sub>2</sub> was evaluated. MnFe<sub>2</sub>O<sub>4</sub>-G@WA showed 94% of efficiency for photocatalytic decolorization of MB under operating conditions of solar irradiation, 0.25 g/L of catalyst, 300 mg/L of H<sub>2</sub>O<sub>2</sub>. The proposed degradation reaction mechanism suggested that the photodegradation of MB was through a synergistic mechanism of photocatalysis and photo-Fenton reactions, with the combined action of the three materials used. The data adjusted to the first order kinetics from the Langmuir–Hinshelwood model. In addition, MnFe<sub>2</sub>O<sub>4</sub>-G@WA showed high stability, maintaining its efficiency above 90% after 5 cycles. The results indicated that the nanophotocatalyst is a potential technology for the decolorization of MB solutions.https://www.mdpi.com/2073-4344/12/7/745calcitedyeeucalyptus ashmagnetic nanoparticlesphotodegradation |
| spellingShingle | Maria Eliana Camargo Ferreira Lara de Souza Soletti Eduarda Gameleira Bernardino Heloise Beatriz Quesada Francielli Gasparotto Rosângela Bergamasco Natália Ueda Yamaguchi Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation Catalysts calcite dye eucalyptus ash magnetic nanoparticles photodegradation |
| title | Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation |
| title_full | Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation |
| title_fullStr | Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation |
| title_full_unstemmed | Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation |
| title_short | Synergistic Mechanism of Photocatalysis and Photo-Fenton by Manganese Ferrite and Graphene Nanocomposite Supported on Wood Ash with Real Sunlight Irradiation |
| title_sort | synergistic mechanism of photocatalysis and photo fenton by manganese ferrite and graphene nanocomposite supported on wood ash with real sunlight irradiation |
| topic | calcite dye eucalyptus ash magnetic nanoparticles photodegradation |
| url | https://www.mdpi.com/2073-4344/12/7/745 |
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